Susceptible C3H mice infected with monomorphic and pleomorphic trypanosomes. Legend: C3H mice infected with either the monomorphic TXTat-1 clone of Trypanosoma brucei gambiense or the pleomorphic Loutat-1 clone of Trypanosoma brucei rhodesiense. Panel A shows the number of trypanosomes per ml of blood. Panel B shows the percentage of the pleomorphic trypanosomes that are in the LS stage. Panel C depicts the percentage of mouse hourly carbohydrate intake (Haugh D, Technical Director Laboratory Group, Purina Mills, St. Louis Missouri, Personal Communication, 2002) that would be consumed by the circulating trypanosomes. Von Brand  estimated that trypanosomes use 50–100% of their dry weight in glucose each hour. For these calculations, LS trypanosomes were estimated to use 75% of their dry weight and the SS form to use half as much, or 37.5%.